ADC calibration

[ManishNair]

Hi,

How to calibrate the adc... I am using Nucleo H743 and my H753 boards. Vref is 3.32V in nucleo, and 3.31V in my board.. when i convert the adc value by simply multiplying with Vre/65536, the result is almost greater than 11.mV (for Vin> 1.0000V) to 55mV (for Vin < 20mV)... I doubt a gain factor in the result... Can you help me with a method/reference or equation to convert the adc value to Voltage . the terminal window is given for reference

Oversampling of 64 is enabled

[ManishNair]

Rtc ch10 ch1 ch5 ch4 ch6 ->adc3

17.01.19 - 04:01:57 1.2494 1.2096 0.8129 0.4167 0.0174  

17.01.19 - 04:01:57 1.2494 1.2094 0.8128 0.4167 0.0174  

17.01.19 - 04:01:58 1.2494 1.2097 0.8129 0.4167 0.0173  

17.01.19 - 04:01:58 1.2495 1.2096 0.8129 0.4167 0.0175  

17.01.19 - 04:01:59 1.2494 1.2093 0.8128 0.4168 0.0174  

17.01.19 - 04:01:59 1.2494 1.2094 0.8128 0.4168 0.0173  

17.01.19 - 04:02:00 1.2494 1.2097 0.8128 0.4167 0.0176  

17.01.19 - 04:02:00 1.2493 1.2096 0.8129 0.4168 0.0173  

17.01.19 - 04:02:01 1.2495 1.2094 0.8129 0.4168 0.0173